moulart



l (No Model.)

A. J. MGULART. LOCK WITH ELECTRIC SAFETY ATTACHMENT.

Patentedct. 20, 1896.

m: Nnsms Ptrnns co, mow-Limo.. WASHINGTON. u. c.

UNITED STATES ADRIEN I. MOULART,

PATENT @Erica OF PARIS, FRANCE.

LOCK WITH ELECTRIC SAFETY ATTACHMENT.

SPECIFICATION forming part of Letters :Patent` No. 569,882', datedOctober 20, 1396.

Application filed June 6, 1895. Serial No. 551,920. (No model.)

To all whom, t may con/cern:

Be it known that I, ADRIEN JOSEPH MOU- LAET, a citizen of the FrenchRepublic, and a resident of Paris, France, have invented a newandImproved Lock with Electric Safety Arrangement, of which the followingis a full, clear, and exact description.

My invention relates to a safety attachment for locks of anydescription, and has for its obj ect to provide means whereby a signalwill be given every time the lock is opened.

The invention comprises an arrangement of parts whereby when a key orother tool is inserted in the keyhole an electric circuit will be closedand a signaling apparatus included in such circuit will be operated. The.invention also comprises an arrangement of parts whereby an electricalsignaling device will be actuated whenever the bolt of the lock is movedinward.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding` parts in all the views.

Figure l. is a front elevation of a lock constructed according to myimprovement. Fig. 2 is a broken front elevation thereof with parts insection. Fig. 3 is a cross-section on line as fr of Fig. 2. Fig. 4 isahorizontal section on line y y of Fig. l, and Fig. is a verticalsection on line e' e' of Fig. 4..

The safety attachment located within the keyhole is so constructed as tobe operated by the insertion of a key or other metallic or conductingarticle. A second safety attachment is arranged to be operated by thelocking-bolt in such a manner as to close the circuit when the bolt isdrawn into the casing of the lock.

The attachment wit-hin the keyhole consists of two half-sleeves d l),which are secured to the keyhole-sleeve c, but insulated therefrom andfrom each other, the said half-sleeves being spaced at their ends, aswill be seen best in Figs. l and 5. Each of the sleeves is connected toone of the wires of the circuit, (see Fig. 1,) and in the said circuitis arranged a signaling apparatus of any suitable kind, an electric bellbeing` indicated at d.

It will be obvious that whenever a metallic or conducting article, suchas a key or a picklock, is inserted in the keyhole the circuit will becompleted by the said article bridging the gap between the half-sleevesa and b, and thus the signaling apparatus d will be actuated. An audiblesignal will therefore be given whenever the lock is opened, and this maybe availed of as a protection against burglars.

The second safety attachment,asillustrated in Figs. l, 2, and 3,consists of a spring f, which is secured to the rear wall g of thecasing e of the lock, the spring being insulated from the casing. At thefront end of the spring is secured a block 7L of insulating material,the end of the spring projecting in advance of the said block, asillustrated at z'. When the lock is closed, as illustrated by Fig.'l,the bolt 7c is in contact with the insulating-block h. lVhen, however,the lock is opened, or the bolt k is moved inward in any other manner,the spring f will assume the position illustrated by Fig. 2, in whichthe end '1I of the spring comes in contact with the bolt 7e. The springf is connected to one pole of the battery, and the casing c, with whichthe bolt 7c is permanently in contact, connects with the other pole ofthe battery, the bell d or other signaling device being included in suchcircuit. Thus it will be seen that in the position illustrated by Fig. 2the circuit will be closed and the signaling device actuated. The freeend t' of the spring f is preferably turned upon itself, as shown,whereby a good engagement of the spring with the bolt 7e is obtainedwithout undue friction between said parts.

It will be seen that the improved safety arrangement is very simple inconstruction and affords ample protection against burglars, as even incase the lock should be broken open it will be next to impossible to dothat without moving the bolt lo inward and thereby actuating the signal.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. In a lock, two conducting half-sleeves arranged outof contact with each other, a split keyhole-sleeve surrounding them, aninsulating-sleeve between the keyhole-sleeve and the half-sleeves, andan electrically-operated signaling device in circuit with thehalf-sleeves, substantially as described.

ICO

and adapted to be electrically connected upon the insertion of a key orother conductingu'- ticle, :t sliding' bolt, 2L yielding Contact inconducting' contact with the bolt in one position thereof, and insulatedtherefrom in the other position of the bolt, an electric circuit havingtwo branches or shunts in one ol which are included the two insulatedparts of the keyi hole while in the other parallel branch or shunt areincluded the bolt and its yielding Contact, and in electrically-operatedsignaling device in said circuit, substantially :is described.

In witness whereof I lia-ve hereunto sct my hund in presence of twowitnesses.

ADRIEN J. MOULXRT. Witnesses:

G. SOUZAY, ANDRILLOS.

